Abstract:
An optical and ophthalmic glass with high refractive index, high Abbe number and low density, which is distinguished by good chemical stability, good crystallization behavior and capability of chemical hardening, comprises (in % by weight):______________________________________ SiO.sub.2 50-63 B.sub.2 O.sub.3 4-8 Al.sub.2 O.sub.3 1-2 Li.sub.2 O 4-8 Na.sub.2 O 4-8 K.sub.2 O 3-7 sum of M.sub.2 O 11-20 (M = Li, Na, K) MgO 0.5-2 CaO 2-5 sum of MO 0-3 (M = Mg, Ca) TiO.sub.2 8-12.5 ZrO.sub.2 1-3 F.sup.- 0-1 As.sub.2 O.sub.3 0.05-0.15 (optional refining agent) Sb.sub.2 O.sub.3 0.0-0.2 (optional refining agent) ______________________________________
Abstract:
An optical glass with the familiar optical position of n.sub.d >1.70 and v.sub.d >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent by weight): SiO.sub.2 25-42, TiO.sub.2 15-35, B.sub.2 O.sub.3 0.5-7, BaO 3-13, CaO 1-3, Nb.sub.2 O.sub.5 1-20, GeO.sub.2 0-2, Al.sub.2 O.sub.3 0-4, Na.sub.2 O 7.5-15, Li.sub.2 O 0-9, K.sub.2 O 2-10, SrO 0-6, ZnO 0-5, ZrO.sub.2 0-3, and WO.sub.3 0-3.
Abstract translation:具有熟悉的光学位置nd> 1.70和vd> 22的光学玻璃,由于其较低的密度和良好的化学稳定性而与光学位置的熟悉的光学眼镜不同,并且由(以重量百分比计)组成:SiO 2 25-42,TiO2 15-35,B 2 O 3 0.5-7,BaO 3-13,CaO 1-3,Nb 2 O 5 1-20,GeO 2 0-2,Al 2 O 3 0-4,Na 2 O 7.5-15,Li 2 O 0-9,K 2 O 2-10,SrO 0-6,ZnO 0-5,ZrO 2 0-3和WO 3 0-3。
Abstract:
An improved optical glass having an index of refraction of .gtoreq.1.69, an Abbe number of .gtoreq.38, and a density of .ltoreq.3.25 g/cm.sup.3, represents a further development of another optical glass recently provided by the same inventors. The new glass has improved suitability for continuous-tank manufacture and increased acidproofness and differs from the other glass in its content of 0.5-4.0% by weight of P.sub.2 O.sub.5 ; its sum total of SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3 +P.sub.2 O.sub.5 being 38.5-41.5% by weight; and its sum total of MgO+CaO being 13-17.5% by weight. The full glass composition, e.g. is in % by weight:______________________________________ SiO.sub.2 26.0-32.5 B.sub.2 O.sub.3 6.0-12.0 Al.sub.2 O.sub.3 0-3.0 P.sub.2 O.sub.5 0.5-4.0 SiO.sub.2 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 + P.sub.2 O.sub.5 = 38.5-41.5 Li.sub.2 O 0-5 Na.sub.2 O 0-6 K.sub.2 O 0-8 Li.sub.2 O + Na.sub.2 O + K.sub.2 O = 4.5-12.0 MgO 0-8 CaO 9-16 MgO + CaO = 13-17.5 SrO 0-6 BaO 0-5 ZnO 0-7 PbO 0-4 SrO + BaO + ZnO + PbO = 0-7 MgO + CaO + SrO + BaO + ZnO + PbO = 17-24 La.sub.2 O.sub.3 6-11 ZrO.sub.2 5-8 La.sub.2 O.sub.3 + ZrO.sub.2 = 13.5-17.5 TiO.sub.2 5-9 Nb.sub.2 O.sub.5 6-11 WO.sub.3 0-4 TiO.sub.2 + Nb.sub.2 O.sub.5 + WO.sub.3 = 14-18 La.sub.2 O.sub.3 + ZrO.sub.2 + TiO.sub.2 + Nb.sub.2 O.sub.5 + WO.sub.3 = 28-33 ZrO.sub.2 + TiO.sub.2 + Nb.sub.2 O.sub.5 = 20-26 ______________________________________
Abstract:
The lead-free and arsenic-free optical glasses have a refractive index of 1.83≦nd≦1.95 and an Abbé number of 24≦νd≦35, good chemical resistance, excellent crystallization stability and a composition, in wt. % based on oxide content, of SiO2, 2-8; B2O3, 15-22; La2O3, 35-42; ZnO, 10-18; TiO2, 9-15; ZrO2, 3-10; Nb2O5, 4-10; and WO3, >0.5-3. Besides containing at most 5 wt. % of each of GeO2, Ag2O and BaO and conventional fining agents, they may also contain at most in total 5 wt. % of Al2O3, MgO, CaO, SrO, P2O5 and up to at most in total 5 wt. % of the components F, Ta2O5. The glasses are preferably free of alkali metal oxides, Bi2O3, Y2O3, Gd2O3 and/or Yb2O3. Optical elements made from the optical glass are also described.
Abstract translation:无铅和无砷的光学眼镜的折射率为1.83≦̸ nd≦̸ 1.95,Abbé数为24≦̸&ngr; d≦̸ 35,良好的耐化学性,优异的结晶稳定性和组成,以重量计。 基于氧化物含量%,SiO 2,2-8; B2O3,15-22; La2O3,35-42; ZnO,10-18; TiO2,9-15; ZrO2,3-10; Nb2O5,4-10; 和WO3,> 0.5-3。 除含有最多5wt。 GeO 2,Ag 2 O和BaO和常规澄清剂中的每一种的%,它们也可以最多含有5wt。 %的Al 2 O 3,MgO,CaO,SrO,P 2 O 5,最多至多5重量% %的组分F,Ta2O5。 玻璃优选不含碱金属氧化物Bi 2 O 3,Y 2 O 3,Gd 2 O 3和/或Yb 2 O 3。 还描述了由光学玻璃制成的光学元件。
Abstract:
Optical glass with refractive indicies.gtoreq.1.90, Abbe numbers.gtoreq.25 consisting essentially of, in weight percent; 0-10 SiO.sub.2, 2-20 B.sub.2 O.sub.3, 0-2 Al.sub.2 O.sub.3, the sum of SiO.sub.2, B.sub.2 O.sub.3, and Al.sub.2 O.sub.3 being 7.5-25, 1-16 TiO.sub.2, 0-10 ZrO.sub.2, 35-55 La.sub.2 O.sub.3, 0.5-10 Y.sub.2 O.sub.5, 0.5-15 Nb.sub.2 O.sub.5, 0-10 Gd.sub.2 O.sub.3, 0-15 Ta.sub.2 O.sub.5, 0-3 P.sub.2 O.sub.5 wherein the ratio of SiO.sub.2 to B.sub.2 O.sub.3 is between 0.1 and 1.6, and the sum of Nb.sub.2 O.sub.5 and Ta.sub.2 O.sub.5 is from 9 to 20%.
Abstract translation:折射指数> / = 1.90,阿贝数> / = 25的光学玻璃基本上以重量百分比计; 0-10SiO 2,2-20B 2 O 3,O 2 Al 2 O 3,SiO 2,B 2 O 3和Al 2 O 3的总和为7.5〜25,1-16 TiO 2,0〜10 ZrO 2,35〜55 La 2 O 3,0.5〜10重量% -15 Nb2O5,0-10 Gd2O3,0-15 Ta2O5,0-3P2O5,其中SiO2与B2O3的比例在0.1和1.6之间,Nb2O5和Ta2O5之和为9%至20%。
Abstract:
These objects have been attained by providing highly absorbent lead containing alkali metal silicate glasses for cathode ray tube image screens, having a linear absorption coefficient .mu. of >30 cm.sup.-1 (0.6 .ANG.) and with a high resistance to discoloration by X-ray and electron radiation, comprises, in weight percent:______________________________________ SiO.sub.2 20-65% P.sub.2 O.sub.5 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 0-30% Li.sub.2 O 0-5% Na.sub.2 O 0-10% K.sub.2 O 0-15% MgO + CaO + ZnO 0-15% SrO 0-20% BaO 0-40% PbO 5-60% ZrO.sub.2 0-10% CeO.sub.2 0.1-5% Other Components 0-20%. ______________________________________
Abstract:
A borosilicate glass composition suitable for use as an eyeglass lens, characterized by having a refractive index nd.gtoreq.1.58, an Abbe number vd.gtoreq.45, a density .rho..ltoreq.2.75 g/cm.sup.3, and an excellent aptitude for chemical hardening, consisting essentially of the following composition, in weight percent:______________________________________ SiO.sub.2 51-65 B.sub.2 O.sub.3 2-14 Al.sub.2 O.sub.3 0-5 SiO.sub.2 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 62-73 Li.sub.2 O 4-13 Na.sub.2 O 0-4 K.sub.2 O 0-4 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 7-15 CaO 1-19 MgO 0-11 CaO + MgO 6-22 TiO.sub.2 0-8 ZrO.sub.2 0-9. ______________________________________
Abstract translation:一种适合用作眼镜镜片的硼硅酸盐玻璃组合物,其特征在于具有折射率nd> / = 1.58,阿贝数vd> / = 45,密度rho <2.75g / cm3,以及优异的化学性质 硬化,基本上由以下组成组成,重量百分比:-SiO 2 51-65 -B 2 O 3 2-14 -Al 2 O 3 0-5 -SiO 2 + B 2 O 3 + Al 2 O 3 62-73 -Li 2 O 4-13 -Na 2 O 0-4 -K 2 O -4 -Li2O + Na2O + K2O 7-15 -CaO 1-19 -MgO 0-11 -CaO + MgO 6-22 -TiO2 0-8-ZrO2 0-9。 -